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Research Article


Hematological alterations and bacterial abundance of Edwardsiella tarda in catfish (Clarias Sp.) cohabiting with carrier silver rasbora (Rasbora argyrotaenia)

Dwi Kurniawati, Evi Fitriana, Wahju Tjahjaningsih, Mohammad Faizal Ulkhaq, Maria Agustina Pardede, Jiun-yan Loh.


Abstract
Background:
Catfish farming is often practiced with high stocking densities, which can result in environmental degradation, leading to stress and rendering the fish more vulnerable to infections such as Edwardsiellosis caused by E. tarda. Infection by E. tarda can occur through horizontal transmission during cohabitation of infected and healthy fish.

Aim:
This study aimed to investigate the hematological profile and the abundance of E. tarda in catfish following cohabitation with carrier silver rasbora.

Methods:
A total of 160 silver rasboras (length: 6.02±0.36 cm, weight: 2.065±0.565 g) were immersed in an E. tarda suspension at a concentration of 1013 CFU/ml for two weeks. Subsequently, they were cohabitated with 240 catfish (length: 6.9±2.35 cm, weight: 2.78±1.37 g) at different density ratios: 1:1 (P1), 1:2 (P2), 2:1 (P3), along with a negative control (without E. tarda, NC), and with E. tarda at 1013 CFU/ml (positive control/PC) for 5 days. The observed parameters included hematological profiles (total erythrocytes, leukocytes, hemoglobin levels, and leukocyte differentials) and the density of E. tarda in various catfish organs (liver, kidneys, and spleen).

Results:
The results indicated that catfish cohabiting with E. tarda-infected silver rasbora exhibited significant hematological alterations, including elevated percentages of neutrophils, lymphocytes, and monocytes, alongside decreased erythrocyte counts, hemoglobin levels, and total leukocyte counts. Furthermore, the highest density of E. tarda was detected in the liver (1.15±0.11 ×104 CFU/ml) in comparison to other organs.

Conclusion:
Cohabitation between healthy catfish and E. tarda-carrier silver rasbora resulted in bacterial infection in the catfish.

Key words: Catfish, Cohabitation, Edwardsiellosis, Fisheries, Silver Rasbora


 
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How to Cite this Article
Pubmed Style

Kurniawati D, Fitriana E, Tjahjaningsih W, Ulkhaq MF, Pardede MA, Loh J. Hematological alterations and bacterial abundance of Edwardsiella tarda in catfish (Clarias Sp.) cohabiting with carrier silver rasbora (Rasbora argyrotaenia). Open Vet J. 2025; 15(4): 1654-1662. doi:10.5455/OVJ.2025.v15.i4.17

Web Style

Kurniawati D, Fitriana E, Tjahjaningsih W, Ulkhaq MF, Pardede MA, Loh J. Hematological alterations and bacterial abundance of Edwardsiella tarda in catfish (Clarias Sp.) cohabiting with carrier silver rasbora (Rasbora argyrotaenia). https://www.openveterinaryjournal.com/?mno=233029 [Access: May 07, 2025]. doi:10.5455/OVJ.2025.v15.i4.17

AMA (American Medical Association) Style

Kurniawati D, Fitriana E, Tjahjaningsih W, Ulkhaq MF, Pardede MA, Loh J. Hematological alterations and bacterial abundance of Edwardsiella tarda in catfish (Clarias Sp.) cohabiting with carrier silver rasbora (Rasbora argyrotaenia). Open Vet J. 2025; 15(4): 1654-1662. doi:10.5455/OVJ.2025.v15.i4.17


Vancouver/ICMJE Style

Kurniawati D, Fitriana E, Tjahjaningsih W, Ulkhaq MF, Pardede MA, Loh J. Hematological alterations and bacterial abundance of Edwardsiella tarda in catfish (Clarias Sp.) cohabiting with carrier silver rasbora (Rasbora argyrotaenia). Open Vet J. (2025), [cited May 07, 2025]; 15(4): 1654-1662. doi:10.5455/OVJ.2025.v15.i4.17


Harvard Style

Kurniawati, D., Fitriana, . E., Tjahjaningsih, . W., Ulkhaq, . M. F., Pardede, . M. A. & Loh, . J. (2025) Hematological alterations and bacterial abundance of Edwardsiella tarda in catfish (Clarias Sp.) cohabiting with carrier silver rasbora (Rasbora argyrotaenia). Open Vet J, 15 (4), 1654-1662. doi:10.5455/OVJ.2025.v15.i4.17


Turabian Style

Kurniawati, Dwi, Evi Fitriana, Wahju Tjahjaningsih, Mohammad Faizal Ulkhaq, Maria Agustina Pardede, and Jiun-yan Loh. 2025. Hematological alterations and bacterial abundance of Edwardsiella tarda in catfish (Clarias Sp.) cohabiting with carrier silver rasbora (Rasbora argyrotaenia). Open Veterinary Journal, 15 (4), 1654-1662. doi:10.5455/OVJ.2025.v15.i4.17


Chicago Style

Kurniawati, Dwi, Evi Fitriana, Wahju Tjahjaningsih, Mohammad Faizal Ulkhaq, Maria Agustina Pardede, and Jiun-yan Loh. "Hematological alterations and bacterial abundance of Edwardsiella tarda in catfish (Clarias Sp.) cohabiting with carrier silver rasbora (Rasbora argyrotaenia)." Open Veterinary Journal 15 (2025), 1654-1662. doi:10.5455/OVJ.2025.v15.i4.17


MLA (The Modern Language Association) Style

Kurniawati, Dwi, Evi Fitriana, Wahju Tjahjaningsih, Mohammad Faizal Ulkhaq, Maria Agustina Pardede, and Jiun-yan Loh. "Hematological alterations and bacterial abundance of Edwardsiella tarda in catfish (Clarias Sp.) cohabiting with carrier silver rasbora (Rasbora argyrotaenia)." Open Veterinary Journal 15.4 (2025), 1654-1662. Print. doi:10.5455/OVJ.2025.v15.i4.17


APA (American Psychological Association) Style

Kurniawati, D., Fitriana, . E., Tjahjaningsih, . W., Ulkhaq, . M. F., Pardede, . M. A. & Loh, . J. (2025) Hematological alterations and bacterial abundance of Edwardsiella tarda in catfish (Clarias Sp.) cohabiting with carrier silver rasbora (Rasbora argyrotaenia). Open Veterinary Journal, 15 (4), 1654-1662. doi:10.5455/OVJ.2025.v15.i4.17


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